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package TAP::Object;
use strict;
use vars qw($VERSION);
=head1 NAME
TAP::Object - Base class that provides common functionality to all C<TAP::*> modules
=head1 VERSION
Version 3.14
=cut
$VERSION = '3.14';
=head1 SYNOPSIS
package TAP::Whatever;
use strict;
use vars qw(@ISA);
use TAP::Object;
@ISA = qw(TAP::Object);
# new() implementation by TAP::Object
sub _initialize {
my ( $self, @args) = @_;
# initialize your object
return $self;
}
# ... later ...
my $obj = TAP::Whatever->new(@args);
=head1 DESCRIPTION
C<TAP::Object> provides a default constructor and exception model for all
C<TAP::*> classes. Exceptions are raised using L<Carp>.
=head1 METHODS
=head2 Class Methods
=head3 C<new>
Create a new object. Any arguments passed to C<new> will be passed on to the
L</_initialize> method. Returns a new object.
=cut
sub new {
my $class = shift;
my $self = bless {}, $class;
return $self->_initialize(@_);
}
=head2 Instance Methods
=head3 C<_initialize>
Initializes a new object. This method is a stub by default, you should override
it as appropriate.
I<Note:> L</new> expects you to return C<$self> or raise an exception. See
L</_croak>, and L<Carp>.
=cut
sub _initialize {
return $_[0];
}
=head3 C<_croak>
Raise an exception using C<croak> from L<Carp>, eg:
$self->_croak( 'why me?', 'aaarrgh!' );
May also be called as a I<class> method.
$class->_croak( 'this works too' );
=cut
sub _croak {
my $proto = shift;
require Carp;
Carp::croak(@_);
return;
}
=head3 C<_construct>
Create a new instance of the specified class.
=cut
sub _construct {
my ( $self, $class, @args ) = @_;
$self->_croak("Bad module name $class")
unless $class =~ /^ \w+ (?: :: \w+ ) *$/x;
unless ( $class->can('new') ) {
local $@;
eval "require $class";
$self->_croak("Can't load $class") if $@;
}
return $class->new(@args);
}
1;
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